#
# Pyserini: Python interface to the Anserini IR toolkit built on Lucene
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

import argparse

if __name__ == '__main__':
    parser = argparse.ArgumentParser(description='Keeps only queries in a qrels file.')
    parser.add_argument('--qrels', required=True, help='MS MARCO tsv qrels file.')
    parser.add_argument('--queries', required=True, help='Queries file.')
    parser.add_argument('--output', required=True, help='Output queries file.')

    args = parser.parse_args()

    qrels = set()
    with open(args.qrels) as f:
        for line in f:
            query_id, _, _, _ = line.rstrip().split('\t')
            qrels.add(query_id)

    with open(args.output, 'w', encoding='utf-8', newline='\n') as fout:
        with open(args.queries, encoding='utf-8') as f:
            for line in f:
                query_id, _ = line.rstrip().split('\t')
                if query_id in qrels:
                    fout.write(line)

    print('Done!')
